Give the uses of zinc.

Explain the following terms with suitable examples.
(i) Gangue
(ii) slag

Before reduction, the ore is first converted into the oxide of metal of interest. Give reason

Write a short note on hydroboration.

How will you prepare chlorine in the laboratory?

Give the uses of argon.

Calculate the number of unpaired electrons in Ti³⁺ , Mn²⁺ and calculate the spin only magnetic moment.

Explain the variation in E⁰_{M³⁺/M²⁺}  3d series.

Give the difference between double salts and coordination compounds.

Explain briefly the collision theory of bimolecular reactions.

How can the following conversion be effected? (i) Phenol to phenolphthalein.

Explain Stephen's reaction.

Organic compound with molecular formula C₃H₆O has two isomers (A) and (B). (A) on heating with NaOH in I₂ forms a yellow precipitate while (B) does not. Identify the isomers A and B and explain the reactions.

Aniline reacts with Br₂/H₂O to give a tribromo derivative. How would you convert aniline to get a monobromo derivate?

Write a reaction that indicates the presence of an aldehyde group in glucose.

Give the sources of vitamin A and E and list the deficiency disease caused by lack of vitamin A and E in diet.

What are drugs? How are they classified.

Explain the mechanism of cleansing action of soaps and detergents.

Name some important categories of food additives.

Write the preparation of neoprene and give its use.